say it: aych
h is a noun meaning "a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe". It carries 5 recorded senses.
a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
the 8th letter of the Roman alphabet
(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
“enthalpy is the amount of energy in a system capable of doing mechanical work”
thermodynamics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for h come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.